code: def __str__(self) -> str:
      return (
          f"Command {self.argv} returned non-zero exit status {self.returncode}."
          f" Output:\n{self._outerr}"
      )
  
file_path: hail/hail/python/hailtop/utils/process.py
imports: from typing import Tuple, List
  import asyncio
  import subprocess
  from .utils import async_to_blocking
label_desc: Use image node_id 2 for calling the CalledProcessError obj's underlying member method code with example usage: obj.__str__() and returns: str, self, str, self, str, self